duckdb SKILL.md skillB
duckdb from ericrisco/rsc-harness is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add ericrisco/rsc-harness/duckdb@git:20260729.9b4d66aPins git:20260729.9b4d66a in mdr.lock. Pin the fingerprint instead.
- Audit grade
- B, 16 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- ericrisco/rsc-harness
- Path
skills/duckdb/SKILL.md- Versions recorded
- 3
- Latest version
- git:20260729.9b4d66a, committed Jul 29, 2026
- First version recorded
- Jun 2, 2026
- Size
- 10,768 bytes
- Repository stars
- 236
- License
- MIT
Use when analytical SQL must run in-process with no server: Parquet/CSV/JSON/Arrow queried in place, OLAP embedded in an app or notebook, a slow pandas groupby on multi-GB data, or S3/lakehouse data read without downloading. NOT a multi-user analytics server (that is clickhouse-analytics), NOT an app's transactional CRUD store (that is postgresdb).
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# DuckDB — embedded columnar OLAP, no server DuckDB is an in-process analytical (OLAP) database: it links into your process like SQLite, but stores data column-by-column and vectorizes execution for aggregates, joins, and window functions. There is no server, no port, no daemon — you `pip install duckdb` (or drop one CLI binary) and query. Its killer move is reading Parquet/CSV/JSON/Arrow **in place**, without a load step, so a folder of files becomes a table. The fact that drives every routing decision below: DuckDB is **one writer, many readers, single process**. It is brilliant for analysis on one machine and wrong for multi-user serving or transactional app writes. Latest stable is **v1.5.3** (released 2026-05-20). Pin the **LTS line (v1.4.x; v1.4.4 LTS shipped 2026-01-26)** for anything long-lived — LTS gets ~1 year of patches and a stable storage format. Use 1.5.x for greenfield exploration. ## Is DuckDB the tool? (decide first) | Your workload | Reach for | | --- | --- | | Analytics over local/remote files, one process, one writer | **duckdb** (this skill) | …
Read the whole file at its exact version.
How to install
mdr add ericrisco/rsc-harness/duckdb@sha256:4c0ab72c7f6626c3The line at the top of this page pins the label git:20260729.9b4d66a, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_teb24lv24gbi3qyl)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between Jun 2, 2026 and Jul 29, 2026, about one every 29 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260729.9b4d66a latest | 2026-07-29 | 9b4d66a | 10,768 B | B | view · diff |
| git:20260615.5ea6bc3 | 2026-06-15 | 5ea6bc3 | 11,771 B | B | view · diff |
| git:20260602.a962997 | 2026-06-02 | a962997 | 11,717 B | B | view |
Audit of the latest version
- fail: No curl or wget piped into a shell (matched: curl https://install.duckdb.org | sh)
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (10768 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Starting a new one? Use a template for SKILL.md on mdpantry, which passes every one of these checks and says what to change in it.
Source
ericrisco/rsc-harness · 236 stars · license MIT · pushed 2026-10-21 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_teb24lv24gbi3qyl GET https://markdownregistry.com/api/v1/resolve?ref=ericrisco/rsc-harness/duckdb GET https://markdownregistry.com/api/v1/blob/4c0ab72c7f6626c3b3db5fe3eb85111e21a5a4eb93b1e7677f4bbaf3e36061e1
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.
More from ericrisco/rsc-harness
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